Pump



Em. 25. i923. E?

s. WOTTRHNGET- AL.

PUMP

Filed Nov. 27. 1922 y 3 Sheets-stmt l PUMP .Filed Nov, 27. 1922 3 Smetswheet 2 u n 17 25 w23. Mmm De@ s s. a.. WoW-RING ET AL PUMP Fired Novv 27. 1922 5 sneetsmsnem 15 Patented Dec. 25, i923.

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SYLYANUS L. WOTTRING AND LE .ROY WOTTRING, OF PROSPECT, OHIO, ASSIGNORS T THE PROSPECT MANUFACTURING COMPANY, OF PROSPECT, OHIO, A CORPORATION OF OHIO.

PUMP.

lil'lplicatmn filed November 27, 1922. Serial No. 603,447.

T o all whom t may concern.'

Be it known that we, SYLVANUS L. Wo'r'r-` RING and LE ROY Wo'rTRING, citizens of 4the United States, residinrr at Prospect, in

the county of Marion and State of Ohio,

have invented certain new and useful Improvements in Pumps, of which the Ifollowing is a specification.

This invention relates to an improved l0 pump and more specifically to a rotary water pump especially adapted for use in connection with motor'driven fire fighting apparatus.

Among the objects of the invention are:

l First, to provide a pump in which the rotor chamber is positioned substantially beneath the inlet and outlet conduits of the pump, in orderthat the said chamber will at all times be filled with a sufficient amount of water to prime the pump in order to render the starting thereof convenient to effect without introducing into the rotor chamber an extraneous priming fluid, asl is the usual case. This priming Huid has ordinarily been in the nature of a light lubricating oil, but its use is objectionable in. that the same is apt to destroy or weaken the hose structures through which it passes following the startin of the pump, and also in the fact @9 that de ay is caused, in starting the pump, by the operation of priming the rotor cham ber. The present invention provides a pump wherein this priming of the rotor chamber is dispensed with, and the said chamber` $5 maintained constantly filled with a liquid by locating the intake and outlet conduits above the rotor chamber. Secondly, the provision of a ump containing a rotor chamber in which rotors, in the form of intermeshin gears, are disposed and wherein adjusta le blocks are provided adapted for engagement with the edges of the teeth of the rotors and formed to be maintained constantly in such engagement so as to over- 45 come the edects of wear, providing a pump having a strong powerful suction and capable of being maintained at its point of greatest efficiency for a very considerable period of usage. Third, in providing a 50 jacket around the rotor chamber disposed in communication with the exhaust of the engine of the vehicle upon which the pump is mounted, whereby said exhaust may be circulated through the jacket to prevent freezing of the liquid in the rotor chamber during periods of cold weather, and in providing other improvements which will hereinafter appear by perusal of the following description.

In -the accompanying dra-wings:

Figure 1 is a side elevation of the improved pump comprising the present invent1on,the head plate of the rotorl chamber peing removed to disclose underlying strucure,

Figure 2 is a top pla-n view of the pump,

Figure 3 is a transverse vertical sectional view taken through the pump on the line 3-3 of Figure 1, and

Figure 4 is a horizontal sectional view on the line 4--4 of Figure 1.

Referring more particularly to the details of the invention, the numeral 1 desigu nates the pump comprising the present invention in its entirety. This pump consists of a casing 2, including a substantially rectangular rotor chamber 3, bearings 4 being provided in the ends of saidchamber for the reception of a pair of horizontally extending shafts 5. These shafts are pro vided, within the chamber 3, with rotors 6, in the form of gears,including intermeshing teeth, adapted upon rotation to convey liquid upwardly from the bottom of said chamber and to force the same under pressure into the upper or outlet end of said chamber. To cause the rotors to revolve uniformly, the ends of the shafts 5, at one side of the casing 2, project into a compartment 7, in which is positioned a pair of timing gears 8 employed to transmit and synchronize the motion between the shafts 5, and thereby effect the operation of the rotors 6. To impart power to the said shafts, there is provided a power shaft 9, adapted to be connected with 95 any suitable prime mover not shown). This shaft being provided with a sliding gear 10, whose operation .is controlled by a manual lever 11. The gear 10 rotates with the shaft 9 and by the medium of the lever 11 is ca- 100 pable of being brought into and out of mesh with an idler gear 12, mounted on a stud 13 projecting from the casing 2, the said gear, in turn, vmeshing with a relatively enlarged gear`14 suitably secured to one of the shafts 105 A5, the gearing' described being suitably housed. By this construction power will be imparted to the pump by way of the shaft 9, thence through the medium of the gearing 10, 12 and 14: motion will be imparted to one of the shafts 5, effecting the rotation of the rotor mounted thereon, motion being imparted to the other 0f the shafts 5 by way of the timing gears 8, located in the compartment 7. The bearings 4 may include the usual anti-friction devices 15 in which the shafts 5 are journaled for rotation.

The pump is provided with a pair of longitudinally extending intake conduits 16, which are located on a plane substantially above the rotor chamber 3. The conduits 16 are preferably located on both sides of the chamber 3, and their inner ends terminate in downwardly eXtendin converging branches 17, which communicate with the bottom of the chamber 3 for the purpose of delivering the liquid to be pumped into engagement with the rotor 6. The top of the chamber 3 communicates with an outlet 18, which is dis osed in. communication with a longitudinal y extending outlet conduit 19, extending substantially parallel and on approximately the same plane with the intake conduits 16. These outlet conduits are provided with valves 20 bv means of which the direction of flow of the liquid may be controlled from one side to the other of the pump. 1t will be noted that by this arrangement the inlet and outlet conduits are situated substantially above the rotor cham-` ber 3, and it will thus be apparent that the said rotor chamber will constantly remain filled with water or other liquid handled by the pump. The rotor chamber is thus constantly prlmed, so that the pump may begin operation immediately whenever'.

desired.- The construction described elimi- ,A nates the necessity of inserting lubricating oil or the like into the chamber before the pump is started, and overcomes the delays involved in suchusual priming operations and the resultant injury to the fabric of the hoses connected with the outlets.

Another important feature of the inven? tion resides in means for overcoming the effects of wear upon the rotor 6. This is done by the provision of a pair of Wear blocks 21, mounted in the rotor chamber 3 l contiguous to the vertical sides thereof` said blocks being formed with arcuate groovesl the pump can be readily taken care-of by adjusting the screws 23 enabling the rotors to operate with maximum eiiciency in drawing water from the bottom of the chamber 3 and the inlet conduits and enforcing the water into the -upper part ot the chamber 2 and the outlet, conduits.

To preventfreezing of the water within the rotor chamber 3 during inclement weather conditions, the casing 2 is 'acketed as at 24 and is adapted for connection with the exhaust of the engine of the vehicle upon which the pump is mounted. It will be apparent that upon the operation of the engine, the heated exhaust gases thereof may be circulated around the chamber 3, thus preventing the formation of ice in said chamber and enabling the rotors, when the pump is in active operation, to operate freely. by-pass connection 25 is provided between the inlet and outlet conduits 16 and 19 respectively of the pump vwhere when the churn valve 26 of the by-pass is opened, the water will be circulated between said conduits to reduce the pressure or water iow through the outlet conduits.

1n view of the foregoing description, taken Iin connection with the accompanying drawings, it will be apparent that the present invention provides a' pum formed 'for efficient use in conjunction with motor driven lire fighting apparatus. The said pump is of substantial, simple and efficient construction and is capable of giving extended eiiicient service. Many modifications may be made in the precise form and arrangement shown and all such as do not depart from `'the spirit and scope of our invention we propose to cover in the following claims.

What is claimed is:

1. 1n a pump, a casing including a chamber, pumping means mounted in said chamber, horizontally extending inlet and outlet conduits in communication with said chamber, and disposed in lateral oiset relation,

said conduits being arranged on a plane substantially above said chamber, whereby the latter will be maintained in a prime condition at all times.

2. In al pump, a casing including a chamber, pumplng means mounted for operation within said chamber, an intake conduit extending on a horizontal plane substantially above said chamber, downwardly vextending branches leading from the lower side lof said intake conduit into said chamber,

and an outlet conduit disposed on a plane substantially above said chamber and in communication with the exhaust side of said chamber.

3. In a rotary pump, a casing having a chamber formed therein, rotors mounted within said chamber, an intake conduit disposed mainly in a' plane above said chamber, said intake conduit terminating in al rotors, said conduitsv being disposed in downwardly extending extremity termilateral offset rela-tion.

mating in communication with the lower part In testimony Whereor1 We aflix our signa- 10 of said chamber and beneath said rotors, tures.

an outlet conduit disposed mainly in a plane above said chamber and in communication SYLVANUS L. WOTTRING. with the top of said chamber above said LE ROY WOTTRING. 

